Self-aligning pumping chamber



FIG. 1 is a front elevational view of a self-aligning pumping chamber showing my new design;

FIG. 2 is a side elevational view;

FIG. 3 is a rear elevational view;

FIG. 4 is a top plan view; and,

FIG. 5 is a bottom plan view. 

The ornamental design for a self-aligning pumping chamber, as shown. 